57869991 has 16 divisors (see below), whose sum is σ = 90246400. Its totient is φ = 36549144.

The previous prime is 57869951. The next prime is 57870013. The reversal of 57869991 is 19996875.

57869991 is a `hidden beast` number, since 578 + 69 + 9 + 9 + 1 = 666.

It is not a de Polignac number, because 57869991 - 2¹³ = 57861799 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57869951) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55891 + ... + 56916.

It is an arithmetic number, because the mean of its divisors is an integer number (5640400).

Almost surely, 2^57869991 is an apocalyptic number.

57869991 is a deficient number, since it is larger than the sum of its proper divisors (32376409).

57869991 is a wasteful number, since it uses less digits than its factorization.

57869991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112835 (or 112829 counting only the distinct ones).

The product of its digits is 1224720, while the sum is 54.

The square root of 57869991 is about 7607.2328083213. The cubic root of 57869991 is about 386.7982242429.

The spelling of 57869991 in words is "fifty-seven million, eight hundred sixty-nine thousand, nine hundred ninety-one".